chore: Add dlp mdlp stable pair (#9045)

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---

## PR-Codex overview
This PR focuses on adding a DLP-mDLP stable pair to the code. 

### Detailed summary
- Added `dlp` and `mdlp` tokens with their respective details.
- Added a stable swap configuration for the DLP-mDLP LP pair.

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.changeset/fifty-nails-sit.md

@@ -0,0 +1,6 @@
+---
+'@pancakeswap/smart-router': patch
+'@pancakeswap/tokens': patch
+---
+
+Add dlp mdlp stable pair

packages/smart-router/evm/constants/stableSwap/arb.ts

@@ -13,4 +13,14 @@ export const pools: StableSwapPool[] = [
     stableLpFee: 0.0025,
     stableLpFeeRateOfTotalFee: 0.5,
   },
+  {
+    lpSymbol: 'DLP-mDLP LP',
+    lpAddress: '0x0db5e247ab73FBaE16d9301f2977f974EC0AA336',
+    token: arbitrumTokens.dlp,
+    quoteToken: arbitrumTokens.mdlp,
+    stableSwapAddress: '0xd0f0be815a76eFE677c92b07b39a5e972BAf22bD',
+    infoStableSwapAddress: '0x58B2F00f74a1877510Ec37b22f116Bf5D63Ab1b0',
+    stableLpFee: 0.0025,
+    stableLpFeeRateOfTotalFee: 0.5,
+  },
 ]

packages/tokens/src/constants/arb.ts

@@ -247,4 +247,20 @@ export const arbitrumTokens = {
     'USDV',
     'https://usdv.money/',
   ),
+  dlp: new ERC20Token(
+    ChainId.ARBITRUM_ONE,
+    '0x32dF62dc3aEd2cD6224193052Ce665DC18165841',
+    18,
+    'DLP',
+    'RDNT-WETH',
+    'https://pancakeswap.finance',
+  ),
+  mdlp: new ERC20Token(
+    ChainId.ARBITRUM_ONE,
+    '0xfe14F790DA92971131544d915c4ADa6F1abce3Bd',
+    18,
+    'mDLP',
+    'Magpie locked DLP',
+    'https://www.radiant.magpiexyz.io/stake',
+  ),
 }